A monograph of British belemnitidae: Jurassic - download pdf or read online

By Phillips J.

Show description

Read Online or Download A monograph of British belemnitidae: Jurassic PDF

Similar nonfiction_1 books

Download PDF by Drobney, J. G.: Fluoroplastics

Fluoropolymers have been chanced on by chance by way of Plunkett in 1938. He used to be engaged on freon and by chance polymerised tetrafluoroethylene. the outcome was once polytetrafluoroethylene (PTFE), more often than not referred to as Teflon. PTFE is inert to nearly all chemical substances and is taken into account to be the main slippery fabric in life – it has the bottom coefficient of friction of any recognized strong fabric.

Download PDF by Plunkett J.W.: Plunkett's Energy Industry Almanac

The power is boiling over with alterations. Deregulation, new possibilities in overseas fields and markets and environmental demanding situations are dashing jointly head-on to form the power and utilities enterprise of the long run. tremendous deep offshore wells within the Gulf of Mexico and offshore of West Africa are being drilled at huge fee.

Additional info for A monograph of British belemnitidae: Jurassic

Sample text

Among thern one or two rnay be chosen which fairly match our English examples. n, of Lias Belemnites are occasionally seenin foreign museums beariug the namesof B. breu,irostris,D,Orb. (also calledB' curtuson plate x, figs. l-6, of this author's "Ierr. Jurassiqles,'AnclB. rostriforntis (Qu'), which come near to our specimens. 1, slrort, compressedBelemnite,with acro-lateral grooves,anclis rankecl u,noog theBelentnites trQtartiti by Quensteclt. r i-. necessar)-foi. tlris not common fossil, for which the only synonym I can suggest is 3l.

Eston l{ab, Yorkshire,in ironstoneof the Middle Lias (Pltillips). Glastonbury,in I'Iiddle Lias (Plti,lli,ps). summit, more or less prontinent terminatedby n snbmucronate Ven. -1. Guarc'L from the ventral half of the substance,and more or less inflectedtowardsthe back" traceable(Pl. IV, fig" 10 n, L0 c, 101). Lateralfurrolvsnearthe back al'ways Greatestlengthobserved , 2'5 inches; greatestdiameter,0'6 inch. LongitLrdinalsectionsshowthe axis to be excentric,arched,and much nearerto the least so towardsthe apex of ventralside,remarkablyso at the apexof the phragmocone, substance sothat the sparr"rsectionsshowthe sidesto be flattened, the guarcl.

B. With Iurrowsat the apex. BB. Alveoluscentral. BBB. Alveolusexcentric. Crxer,rcur,Arl. Lanceolate, with ventraldepression, but no lateralgrooves. Oolite. A. Srnooth. AA. Alveolusexcentric. AAA. Alveoluscentral. B. Unisulcate. BB. Alveoluscentral. BBB. Alveolusexcentric, C. Bicanaliculate. I ProfessorE. Suesshas lately given figuresand descriptions 'Proceedings of the Acanthoteuthidre, of the ImperialAcademy,' Vienna,186i. i) BRITISH BELEMNITES. 30 and Oolite. rt. Fnsiform,with lateralgroovesor canals.

Download PDF sample

A monograph of British belemnitidae: Jurassic by Phillips J.

by Charles

Rated 4.48 of 5 – based on 45 votes